1. Store detailed toner cartridge information (facilitates printing and identification of all toner cartridge models)
2. Display the print volume of the toner cartridge instead of controlling the print volume
3. Display area information (some printer manufacturers design different chip codes for different areas)
4. Failure to authorize the printer and toner cartridge passes
a. Must respond accurately to printer requests
b. Use the correct encryption method
c. Respond within the specified time
5. Manage toner information according to printer requirements
a. The printer determines the remaining amount of toner and writes the information to the chip
b. The chip feeds back this information when the printer needs it
6. During use, toner cartridges are classified according to different printers: real-time, indirect periodic, and multiple storage information.
a. The printer counts the printing volume and stores it on the chip
b. The printer counts pixels (print coverage) and stores them on the chip
c. The chip feeds information back to the printer as needed